942
FNCA52 TJSJ 270730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST SUN SEP 27 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-272000-
SOUTHEAST COASTAL PLAINS-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 20
TEMP (24H TREND) 91 (+1) 74 (-3) 90
RH % (24H TREND) 52 (-5) 93 (+7) 46
WIND 20FT/EARLY(MPH) E 12 E 11 E 13
WIND 20FT/LATE(MPH) SE 12 NE 10 SE 16
MIXING HGT(FT-AGL/MSL)5100 4800
TRANSPORT WND (MPH) E 13 E 16
VENT RATE (KT-FT) 56100 67200
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-272000-
SOUTHERN HILLS-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 30 40
TEMP (24H TREND) 88 (+2) 70 (-4) 88
RH % (24H TREND) 61 (-4) 99 (+8) 60
WIND 20FT/EARLY(MPH) E 10 E 9 E 11
WIND 20FT/LATE(MPH) SE 10 E 10 SE 12
MIXING HGT(FT-AGL/MSL)5780 5430
TRANSPORT WND (MPH) E 12 E 16
VENT RATE (KT-FT) 57800 76020
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-272000-
NORTH COASTAL PLAINS-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 50 40
TEMP (24H TREND) 91 (0) 74 (-2) 90
RH % (24H TREND) 61 (-3) 99 (+6) 63
WIND 20FT/EARLY(MPH) E 10 E 11 E 12
WIND 20FT/LATE(MPH) E 14 SE 8 E 18
MIXING HGT(FT-AGL/MSL)5310 4690
TRANSPORT WND (MPH) E 9 E 16
VENT RATE (KT-FT) 42480 65660
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-272000-
NORTHERN HILLS-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 80 60 60
TEMP (24H TREND) 89 (0) 71 (-2) 88
RH % (24H TREND) 64 (0) 99 (+4) 64
WIND 20FT/EARLY(MPH) E 8 SE 9 E 11
WIND 20FT/LATE(MPH) E 12 SE 6 E 16
MIXING HGT(FT-AGL/MSL)5770 5300
TRANSPORT WND (MPH) SE 8 E 14
VENT RATE (KT-FT) 40390 63600
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-272000-
WEST COAST-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 20 50
TEMP (24H TREND) 91 (0) 74 (-1) 91
RH % (24H TREND) 64 (+1) 99 (+7) 63
WIND 20FT/EARLY(MPH) E 10 E 9 E 12
WIND 20FT/LATE(MPH) E 12 E 5 SE 13
MIXING HGT(FT-AGL/MSL)4960 4880
TRANSPORT WND (MPH) SE 7 E 9
VENT RATE (KT-FT) 29760 39040
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-272000-
EASTERN INTERIOR-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 50 50 40
TEMP (24H TREND) 90 (+1) 72 (-4) 89
RH % (24H TREND) 61 (0) 100 (+7) 61
WIND 20FT/EARLY(MPH) SE 10 E 10 E 11
WIND 20FT/LATE(MPH) E 12 E 10 E 12
MIXING HGT(FT-AGL/MSL)6350 5670
TRANSPORT WND (MPH) SE 10 E 14
VENT RATE (KT-FT) 57150 68040
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-272000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 50 60 50
TEMP (24H TREND) 86 (+3) 70 (-4) 85
RH % (24H TREND) 65 (-2) 100 (+4) 67
WIND 20FT/EARLY(MPH) E 9 E 9 E 9
WIND 20FT/LATE(MPH) SE 10 E 8 E 12
MIXING HGT(FT-AGL/MSL)4780 4130
TRANSPORT WND (MPH) SE 10 E 14
VENT RATE (KT-FT) 43020 49560
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-272000-
CENTRAL MOUNTAIN RANGE-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 80 40 60
TEMP (24H TREND) 87 (+4) 68 (-4) 86
RH % (24H TREND) 64 (-5) 99 (+5) 64
WIND 20FT/EARLY(MPH) SE 8 E 5 E 9
WIND 20FT/LATE(MPH) E 8 E 5 E 9
MIXING HGT(FT-AGL/MSL)6370 6550
TRANSPORT WND (MPH) SE 9 E 10
VENT RATE (KT-FT) 50960 58950
DISPERSION 5 5
DSI 6 1 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-272000-
CAYEY MOUNTAIN RANGE-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 50 50 40
TEMP (24H TREND) 86 (+2) 70 (-4) 85
RH % (24H TREND) 65 (-1) 100 (+4) 66
WIND 20FT/EARLY(MPH) E 9 E 8 E 9
WIND 20FT/LATE(MPH) SE 9 E 8 E 10
MIXING HGT(FT-AGL/MSL)5500 5090
TRANSPORT WND (MPH) E 10 E 15
VENT RATE (KT-FT) 49500 66170
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-272000-
VIEQUES-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 50 50 50
TEMP (24H TREND) 90 (0) 77 (-4) 88
RH % (24H TREND) 59 (-1) 93 (+9) 62
WIND 20FT/EARLY(MPH) E 12 E 12 E 13
WIND 20FT/LATE(MPH) E 11 E 13 E 13
MIXING HGT(FT-AGL/MSL)3310 3340
TRANSPORT WND (MPH) E 13 E 16
VENT RATE (KT-FT) 36410 46760
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-272000-
CULEBRA-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 40 50 50
TEMP (24H TREND) 91 (+1) 79 (-2) 89
RH % (24H TREND) 62 (-2) 94 (+7) 63
WIND 20FT/EARLY(MPH) E 12 E 11 E 14
WIND 20FT/LATE(MPH) E 11 E 13 E 13
MIXING HGT(FT-AGL/MSL)3430 3250
TRANSPORT WND (MPH) E 13 E 16
VENT RATE (KT-FT) 37730 45500
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-272000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 30
TEMP (24H TREND) 91 (0) 75 (-3) 90
RH % (24H TREND) 55 (-2) 91 (+5) 47
WIND 20FT/EARLY(MPH) E 13 E 12 E 17
WIND 20FT/LATE(MPH) SE 16 E 10 SE 19
MIXING HGT(FT-AGL/MSL)5280 4770
TRANSPORT WND (MPH) E 14 E 17
VENT RATE (KT-FT) 63360 71550
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-272000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 40 30
TEMP (24H TREND) 88 (-1) 77 (-3) 86
RH % (24H TREND) 65 (+1) 92 (+6) 68
WIND 20FT/EARLY(MPH) E 13 E 13 E 16
WIND 20FT/LATE(MPH) E 11 E 13 E 14
MIXING HGT(FT-AGL/MSL)3380 3170
TRANSPORT WND (MPH) E 14 E 16
VENT RATE (KT-FT) 40560 44380
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-272000-
ST CROIX-
330 AM AST SUN SEP 27 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 40 40
TEMP (24H TREND) 89 (-1) 75 (-5) 87
RH % (24H TREND) 65 (+1) 98 (+10) 68
WIND 20FT/EARLY(MPH) E 13 E 14 E 13
WIND 20FT/LATE(MPH) E 12 E 13 E 13
MIXING HGT(FT-AGL/MSL)4810 4650
TRANSPORT WND (MPH) E 14 E 17
VENT RATE (KT-FT) 57720 69750
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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